Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4853591 | Multiple-tube compact low-pressure discharge fluorescent lamp | Lutz Klein, Roland Kastl | 1989-08-01 |
| 4830648 | Method of making a unitary tubular generally U-shaped discharge vessel, particularly for compact fluorescent lamps | Lutz Klein | 1989-05-16 |
| 4801323 | Method of making a discharge vessel for compact low-pressure discharge lamps | Lutz Klein, Gerd-Otto Eckstein, Hans Schmidt, Josef Plischke | 1989-01-31 |